Dean Karnazes Quotes
Run when you can, walk if you have to, crawl if you must; just never give up.
Citations
Karnazes, Dean. Ultramarathon Man: Confessions of an All-Night Runner. Tarcher/Penguin, 2005.
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Dean Karnazes, is an American ultramarathon runner, and author of Ultramarathon Man: Confessions of an All-Night Runner, which details ultra endurance running for the general public.